Code & Data · Local-first

OpenAPI / Swagger Validator Online

Check the essential structure and references of an API document.

Free · No sign-up · Browser-based processing

What OpenAPI / Swagger Validator does

Check the essential structure and references of an API document. The utility is designed for quick, focused work without requiring an account or installing another application.

Common uses

Debug API payloads and configuration files
Prepare data for reviews, tests and migrations
Convert between common development formats

How to use OpenAPI / Swagger Validator

Enter or paste the value you want to process in OpenAPI / Swagger Validator.
Run the tool and review the generated result for the expected format.
Copy or download the result and verify it in the system where it will be used.

Privacy: Runs locally in your browser. Input is not uploaded to the DevNet Kit server.

OpenAPI / Swagger Validator example

Try the tool with this representative input:

{"openapi":"3.0.3","info":{"title":"Example API","version":"1.0.0"},"paths":{"/users":{"get":{"responses":{"200":{"description":"OK"}}}}}}

OpenAPI / Swagger Validator FAQ

Does OpenAPI / Swagger Validator require an account?

No. The tool is available without registration.

Is OpenAPI / Swagger Validator local or remote?

Processing runs in your browser and the input is not uploaded to the DevNet Kit server.

Can I use it on mobile?

Yes. The interface is responsive, although large inputs are usually easier to inspect on a desktop screen.